The day before her death, the singer had sent new songs to guitarist Hogan before working with her side project D.A.R.K with whom she was working on an album.

Dolores, 46, was diagnosed with bipolar disorder in 2014 and the band told how after she got treatment she was “a lot more herself” but still had problems with a back injury suffered while picking up a guitar.

Axeman Hogan said: “It was only the last few years that she started talking about psychological problems, because she didn’t know herself.

“She saw a few different therapists and realised what she had and she started getting treatment for it.

“She was a lot more herself. Especially last year, when we were rehearsing: you wouldn’t even know, because they had found the right cocktail of whatever it was she needed to be on.

“There wasn’t even a case of having to ‘work around it’. The hardest thing was her back, because playing live she could not move as freely as she used to.”

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